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>> How does a program in Gentoo know, where to look for shared libraries? |
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> |
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> The program doesn't know. But the runtime linker does. And those paths are |
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> in /etc/ld.so.conf. This file gets updated automatically by portage when |
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> needed. |
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> |
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> But... sometimes the program also knows and can link against libraries long |
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> after it has started up using a dlopen() call: |
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> |
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> http://linux.die.net/man/3/dlopen |
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> |
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Thank you Nikos. I did read obout this in the Linux HOWTO: |
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http://www.faqs.org/docs/Linux-HOWTO/Program-Library-HOWTO.html#DL-LIBRARIES |
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But I was woundering if the /etc/ld.so.conf was only historical stuff. |
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O.K. is not it's up-to-date. Good to know this. |
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But it also writes that dlopen() is specific for Linux and Solaris. |
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There would be alternatives: |
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|
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1.) The glib library |
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2.) libltdl, which is part of GNU libtool |
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Now I was woundering, which way would Gentoo choose or if that is not |
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package specific at all. Are you sure dlopen() is used as a general |
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approach on Gentoo? |
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Also I installed a few libries with Prefix Gentoo on Cygwin. On Cygwin |
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there is no /etc/ld.so.conf. Yet the libraries are found somehow. I |
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still have to find out how it works in that environment. |
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Al |
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